Explaining what is need of connecting transformer windings in star or delta. Understanding Philosophy for Naming Vector GroupAdvantages & Disadvantages of Star & Delta Connection Explaining different type of vector group.Explaining Clock Method used to draw vector groupHow to Draw Vector Diagram for TransformerHow to make connection Diagram as per vector group1.Introduction21.1 Star Connection21.2 Delta Connections21.3 Difference between Star & Delta connections31.4 Advantages & disadvantages of star winding41.5 Advantages & disadvantages of Delta winding42. What are Transformer Vector Group53. Different Transformer Vector Groups64. Clock Method for Drawing Transformer Vector Group85. Comparison of Star Vs Delta116. Drawing DY11 Vector Diagram and Winding Connections127. Drawing DY1 Vector Diagram and Winding Connections168. Drawing YD1 Vector Diagram and Winding Connections209. Drawing YY0 Vector Diagram and Winding Connections2410. Drawing DD0 Vector Diagram and Winding Connections2611. Drawing YY6 Vector Diagram and Winding Connections29